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Electrical Basics
Published in Albert Thumann, Harry Franz, Efficient Electrical Systems Design Handbook, 2020
“Electric Field Strength”—Around a charge, a region of influence exists called an “electric field.” The electric field strength is defined by the magnitude and direction of the force on a unit positive charge in the field (i.e., force/unit charge).
Electrical and magnetic fields
Published in David Wyatt, Mike Tooley, Aircraft Electrical and Electronic Systems, 2018
The analysis of HIRF is centred on the frequency of transmission and field strength. The practical considerations of RF transmissions are from approximately 10 kilohertz (10kHz) through to 100 gigahertz (100 GHz). Field strength is defined as the magnitude of the electromagnetic energy propagating in free space expressed in volts per meter (V/m). Aircraft systems need to be tested and/or analysed across a range of frequencies and field strengths to determine their susceptibility characteristics. Certain systems (or individual items of equipment) are immune to HIRF and have the ability to continue to perform their intended function. This could occur as an inherent or system design feature of the equipment, e.g. if it is located behind a material (reflection plane) that reflects RF signals.
Electric-Field Strength
Published in John G. Webster, Halit Eren, Measurement, Instrumentation, and Sensors Handbook, 2017
Electric-field strength is defined as the ratio of the force on a positive test charge at rest to the magnitude of the test charge in the limit as the magnitude of the test charge approaches zero. The units of electric-field strength are volts per meter (V m−1). Electric charges and currents are sources of electric and magnetic fields, and Maxwell’s equations [1] provide the mathematical relationships between electromagnetic (EM) fields and sources.
Safety impacts of electric potential and electromagnetic fields as result of faults in electric distribution system
Published in Journal of the Chinese Institute of Engineers, 2020
Bundit Rittong, Somporn Sirisumrannukul
It is commonly known that electricity produces two types of fields: EF and MF. These fields are often combined and referred to as EMF. Field strength decreases rapidly with increasing distance from the source. Very few extensive research publications have been found in the literature on EMF-related health problems. The studies were typically concentrated on any potential association with health issues caused by the effects of EF and MF. Tables 1 and 2 summarize the limits recommended by ICNIRP and IRPA for occupational and general public exposure to 50/60 Hz for EF and MF.